The Engineering Mindset excellence explanation and presentation, I’m a HVAC technician in NYC, it’s always nice to see/hear someone who knows what they’re talking about.
One year ago,I worked in Production Department,which requires me to deal with Production Output everyday and it was kinda boring for me. From then,I found your channel, studied on HVAC system and make your video as my primary reference regarding Chiller operation.Now I've become a Facility guy in another Company thanks to your wonderful videos. Please keep producing videos like this. Your videos help me to change my life.
I am currently working in Dubai and doing condition survey on buildings, till now i haven’t worked with chillers, but only district cooling system, ur videos helped me a lot to get clear pictures
You are the best, you've helped me more than this trade school I just finished. LOL and your videos are straight to the point, short and visual. LOVE THEM! thank you!!!!!!!!!!!!
Your videos are well-done and have helped me learn the basics of refrigeration and chillers. Do you have any plans for a video about air-cooled chillers?
Videos are great visuals are very educational. just started going to school for refrigeration machine operator engineer (NYC) and your videos put images to all the book words Thanks a lot keep'em coming
Thanks for these detailed videos . I tried to check other videos on RUclips for this type of explanation but with no succ. Thank you again . Pleas add more videos your subscribers are waitting .
Thanks for the video. For the plugged pipes, how would you identify which tubes are leaking water to the refrigerant, especially if it’s a smaller leak?
Hi love your videos is this a flooded evap can you do a video explaining this. Also I might be wrong did you not say in this video you had a return and feed temp both at 12c? Thanks
If the spring loaded valve opens to let refrigerant out and into the atmosphere, then do you need to top up refrigerant to replace the ones emitted? And if there an optimum refrigerant load to reduce emissions and reduce the need to top up refrigerant (if even necessary)?
Subscribed! Beautifully and very clearly explained! 👍🏻👍🏻👍🏻 Just one question. How are residual oils or lubricants that accompany refrigerants removed or recovered from the shell? 🤔
Thanks for such a brilliant presentation.I have Some questions How refrigerant absorb all the heat ? Which thing is in the evaporator that made the refrigerant to suck all the heat from chilled water? As the tube contain the water and refrigerant is all around the pipe how come the absorb heat did not affect again to the pipes?
Hi Waleed, The refrigerant has very low boiling point and when it evaporates it takes some of this heat with it, much like it you boil a pan of water, the water evaporates and will carry the heat away as steam. The only thing that makes the refrigerant "suck away" the heat is the temperature difference and specific heat capacity. Hot always moves to cold.
at 9:15 you said "chilled water entering into the evaporator.." but correct me if iam wrong, actually the hot water is entering into the evaporator from AHU and gives up the heat to cold refrigerant and get cooled ans leaves it as cold water. So HOT WATER IN and COLD WATER OUT. Right ?
Thanks for your video, I have one doubt how does Liquid Refrigerant move towards the evaporator at a higher level, what's the driving force to move to higher elevation.
well done very well done comma I have a question. In a chiller with with refrigerant 123 is it possible that air in the system will also cause a surge.?
According to animation in this video evaparator is shown at bottom but in your 3d drawing it was located at top part of chiller and bottom as condenser right?
Is it safe to cut into an abandoned Chiller to remove the copper tubing with a set of cutting torches? Is there flammable gases inside the chiller? Thank you
Thanks a for presentation.may I ask you for the types of refrigerant used in these types of chiller units,and their properties, especially boiling point of refrigerant.
R134a is used on many chillers, check the website of manufactures such as Trane and Daikin Applied. You can find the data for the refrigerants by googling "R134a properties"
Hi Samuel, there could be many reasons. Probably there is a blockage, over/under charged with ref gas, wrong gas, low detla T, broken sensor. It would be best to bring in a service specialist. If you do, make sure you see what they do and ask lots of questions to learn.
Great video! You say that chilled water enters the evaporator, but I thought the water in it would come from the terminals in the building, i.e. it would be water carrying heat collected from the ambient. How does that work?
Yes chilled water enters the return side of evaporator from a terminal and leaves chilled on the supply side of evaporator to a terminal. Heat is transfered through refrigerant to condensing barrel.
I have a question. Within the evaporator there is gas and liquid. Gradually the amount of liquid will full the evaporator, so how could to maintenance the amount of liquid in the evaporator? Thank you.
why do the relief valves need to release the excess refrigerant to the air , is not the pilot valve good enough to use the right amount of refrigerant?
Hey Paul, your videos are so good... have helped me learn so much as an engineer. Are you thinking of going a domestic / drainage public health series?
REQUEST I found this video is very useful. But i cant catch up with some words. I mean u could add a lyrics along with videos or somewhere else That will be brilliant. All Nationality with understanding in fully way.
sir please make a documentary on one famous project hotel or hospital for how hvac system work with proper amount of heat calculation. sir this might be very useful who can't afford
Well done! Now if I can get my junior engineers to stop playing with their bloody iphones long enough to learn how 'our' chiller system works, it will be a good day. How they passed thermo and heat transfer is beyond me.
Please let me get lost already. Does the device used in water/gas (cooler controller type R32, etc.) or water/water and water devices have water or gas flowing in the evaporator? Greetings from Poland
More paases means more heat exchange as larger surface area. That also makes it shorter in length although larger in diameter. More chance for the heat to be full utilised.
These are being phased out now due to their environmental issues. You might like these videos Refrigerant types and future: ruclips.net/video/J77a0keM2Yk/видео.html How refrigerants work: ruclips.net/video/lMqoKLli0Y4/видео.html Refrigerant retrofit guide: ruclips.net/video/1OqgLcU2buQ/видео.html
I can't imagine the pressure reliefs for the refrigerant would just vent to the atmosphere, that would be completely against the law over here in North America. At the very least, it would have to vent into some sort of a sealed tank/cylinder.
Direct expansion that meaning liquid refrigerant entering to the evaporator tube( fin and tube type) .indirect expansion that is liquid refrigerant entering the heat exchanger (chiller)tube side is refrigerant shell side is water
Auto generated subtitles are available on all video, just click the cc button in the video player. Additionally, you can read the article on our website for the topic.
Many thanks for this truly *cool* video! I never even knew about these types of chillers before the last video I watched, but this showed me that they are basically the same principle as a domestic refrigerator - Admittedly on a more industrial scale appropriate to the application - But which transfers heat between secondary inert coolants to reduce the amount of refrigerant required, and also allows the latter to be confined to the plant room where it's much easier to manage and any leaks/escapes are less likely to pose risk to the occupants of the building. ❄💯👍 I keep considering ideas for a hand-driven homebrew/domestically built freezer (I can't afford one by retail, or the electricity to drive one. That's life for disabled people here alas. ♿🏚🇬🇧) but coolant has always been a sticking point; I can't even handle my own gas properly, let alone common refrigerants! 🔥😳 One thing this has shown me is that I don't necessarily have to run on the one circuit; I can apply the chiller/evaporator principle on a smaller scale to have separate circuits for interior and exterior (And reverse the heat transfer if ever needed) and that makes management and construction easier. I'm considering trying out a dense brine made of table salt and tap-water which I _think_ might have high thermal transfer whilst being freeze resistant for the outside coil, and if I can ever bring myself to take the dive I might give it a go! 🧪❄😁
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⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕
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The Engineering Mindset excellence explanation and presentation, I’m a HVAC technician in NYC, it’s always nice to see/hear someone who knows what they’re talking about.
ខ្ញុំចងចេះ
Excellent explanation!!! And nice visuals!
help ifwggzG@@BLAZENYCBLACKOPSI can
One year ago,I worked in Production Department,which requires me to deal with Production Output everyday and it was kinda boring for me.
From then,I found your channel, studied on HVAC system and make your video as my primary reference regarding Chiller operation.Now I've become a Facility guy in another Company thanks to your wonderful videos.
Please keep producing videos like this. Your videos help me to change my life.
Glad to hear we helped you
I am currently working in Dubai and doing condition survey on buildings, till now i haven’t worked with chillers, but only district cooling system, ur videos helped me a lot to get clear pictures
love you engg mindset. Your videos are like spoonfeeding..so simple..so easy to understand !
You are the best, you've helped me more than this trade school I just finished. LOL and your videos are straight to the point, short and visual. LOVE THEM! thank you!!!!!!!!!!!!
Your videos are well-done and have helped me learn the basics of refrigeration and chillers. Do you have any plans for a video about air-cooled chillers?
Thanks brother it feels like real industrial visit, you have great sense to make people understand
Learn how CONDENSERS WORK here: ruclips.net/video/p5uuPsyqnwU/видео.html
Videos are great visuals are very educational. just started going to school for refrigeration machine operator engineer (NYC) and your videos put images to all the book words
Thanks a lot keep'em coming
Glad you enjoyed. There's the old saying a picture is worth a thousand words.
Thank you for this video my presentation on chillers is becoming more easier after understanding how the chillers work
Very clear and simple explanation with examples that you can see. Super!
Thanks for these detailed videos . I tried to check other videos on RUclips for this type of explanation but with no succ. Thank you again . Pleas add more videos your subscribers are waitting .
salehhamid thanks for your support, glad it helped you! hit subscribe to get our updates, plenty more videos coming!
Thanks!
Thank you!
thanks for making these amazing videos full of information and explanation
your video is very well Explanations Refrigerant system chilled water chiller plant thank you so much sir
very well presentation, and very very use full. thankyou
you are the Master in hvac sir
Deeply enjoyed this.
I loved your presentation very much
Please make a video about UV-C Lamps on AHU. Thanks for very informative videos! Keep posting.
You making very good job. Maybe thanks to your videos I will gonna have better job.. :) For studying 5 years as some ingenieur it's too late for me;)
your all video explained and presentation excellent.. many many thanks....
Thanks Damith!
Great explanation. Kindly do a video on screw compressor solenoid loader/unloader for capacity control.
Awesome educational video. Thank you
Thank u for making these kind of videos .
Your videos are extremely well done. Thank you.
I'm a bit confused you are pointing to evaporator in the diagram at 1:03 located on the bottom looks like the Condenser is moving fluids into the AHU.
Your videos are very good, Thanks a for presentation
Thanks for the video. For the plugged pipes, how would you identify which tubes are leaking water to the refrigerant, especially if it’s a smaller leak?
You test the tubes and if it can't hold pressure then it has a hole
Hi love your videos is this a flooded evap can you do a video explaining this. Also I might be wrong did you not say in this video you had a return and feed temp both at 12c?
Thanks
If the spring loaded valve opens to let refrigerant out and into the atmosphere, then do you need to top up refrigerant to replace the ones emitted? And if there an optimum refrigerant load to reduce emissions and reduce the need to top up refrigerant (if even necessary)?
Excellent teaching
Your video is great. Thank you
Great video !
5:30 I think you meant 'the chilled water leaves the evaporator at 6 degrees celsius'
Well spotted. Thank you. Yes it should enter at ~12*c and leave at ~6*c depending on the setpoints.
Are there any compressors and cooling towers used in ice rink to make ice
Subscribed! Beautifully and very clearly explained! 👍🏻👍🏻👍🏻
Just one question. How are residual oils or lubricants that accompany refrigerants removed or recovered from the shell? 🤔
Thanks for such a brilliant presentation.I have Some questions How refrigerant absorb all the heat ? Which thing is in the evaporator that made the refrigerant to suck all the heat from chilled water?
As the tube contain the water and refrigerant is all around the pipe how come the absorb heat did not affect again to the pipes?
Hi Waleed, The refrigerant has very low boiling point and when it evaporates it takes some of this heat with it, much like it you boil a pan of water, the water evaporates and will carry the heat away as steam. The only thing that makes the refrigerant "suck away" the heat is the temperature difference and specific heat capacity. Hot always moves to cold.
Great channel!
at 9:15 you said "chilled water entering into the evaporator.." but correct me if iam wrong, actually the hot water is entering into the evaporator from AHU and gives up the heat to cold refrigerant and get cooled ans leaves it as cold water. So HOT WATER IN and COLD WATER OUT. Right ?
Ajith Khan correct, but the water in that loop is referred to as the chilled water loop regardless of temperature.
Thanks professor.
I have confused let me know, chilled water flow in tube or shell of evaporator??
@@hbk775 chilled water flow inside the tube
Thanks for your video, I have one doubt how does Liquid Refrigerant move towards the evaporator at a higher level, what's the driving force to move to higher elevation.
Pressure
@@EngineeringMindset U mean the pressure from Compressore
Thank you for the video. Does refrigerant enter the evaporator as liquid or a mix of liquid and vapor?
If the expel its heat in the pipe, would it possible that there can be moist in the evap pipe that possibly be mixed in the refrigerant?
Very useful video,,water entering in the condenser is from the cooling tower,how about water entering to the evaporator?thanks
the ahu's and fcu's.
please watch our video on chiller basics
good explanation
well done very well done comma I have a question. In a chiller with with refrigerant 123 is it possible that air in the system will also cause a surge.?
HVince AC yes it could lead to surge. if the refrigerant level was low also or if non compressible fluids entered the compressor.
The Engineering Mindset
thanks for the reply.
thank you brother for good information video and again thank
Have you done a video about the operation of different types of Evap, Flooded, Spray Flooded, Plate etc?
Flooded and plate yes. We also have the chiller terminology video which is a gold mine of info.
According to animation in this video evaparator is shown at bottom but in your 3d drawing it was located at top part of chiller and bottom as condenser right?
its going to vary by manufacturer. It's typically found at the bottom through.
Is it safe to cut into an abandoned Chiller to remove the copper tubing with a set of cutting torches? Is there flammable gases inside the chiller? Thank you
Thanks a for presentation.may I ask you for the types of refrigerant used in these types of chiller units,and their properties, especially boiling point of refrigerant.
R134a is used on many chillers, check the website of manufactures such as Trane and Daikin Applied. You can find the data for the refrigerants by googling "R134a properties"
we use R717 and had a few leaks due to shit maintenance lol
Hi, what caused the existing ice flakes from evaporator sight glass ?
I love your presentation. Well done. If I may ask, what are the likely causes of suction pressure fault in a chiller?
Thanks.
Hi Samuel, there could be many reasons. Probably there is a blockage, over/under charged with ref gas, wrong gas, low detla T, broken sensor. It would be best to bring in a service specialist. If you do, make sure you see what they do and ask lots of questions to learn.
We just covered chiller faults in our recent video! ruclips.net/video/Zu0LVVNNVSw/видео.html
What a great content
Great video! You say that chilled water enters the evaporator, but I thought the water in it would come from the terminals in the building, i.e. it would be water carrying heat collected from the ambient. How does that work?
Yes chilled water enters the return side of evaporator from a terminal and leaves chilled on the supply side of evaporator to a terminal.
Heat is transfered through refrigerant to condensing barrel.
thanks a lot for information
If you can make video for Ammonia chillers
Pls explain loading and unloading process of chillers
Can we use mixture of water and glycol?
অনেক ধন্যবাদ ভাই
Thank you
Can u explain 3d video how the process will run our in evaporator
Thanks a lot, paul
Thank you very much
I have a question. Within the evaporator there is gas and liquid. Gradually the amount of liquid will full the evaporator, so how could to maintenance the amount of liquid in the evaporator? Thank you.
why do the relief valves need to release the excess refrigerant to the air , is not the pilot valve good enough to use the right amount of refrigerant?
Thank-you soooo much god bless you
Hey Paul, your videos are so good... have helped me learn so much as an engineer. Are you thinking of going a domestic / drainage public health series?
Hey, glad you enjoy and find them useful. There's really no limit to what we'll cover, currently focusing on HVAC and electrical.
REQUEST
I found this video is very useful. But i cant catch up with some words.
I mean u could add a lyrics along with videos or somewhere else That will be brilliant.
All Nationality with understanding in fully way.
Every video has subtitles, you just need to turn them on. Some are auto made by google so they are not perfect, others have been translated.
sir please make a documentary on one famous project hotel or hospital for how hvac system work with proper amount of heat calculation.
sir this might be very useful who can't afford
We have some coming. It's very difficult to get permission though. Many companies do not want their data published
good idea...
Well done! Now if I can get my junior engineers to stop playing with their bloody iphones long enough to learn how 'our' chiller system works, it will be a good day. How they passed thermo and heat transfer is beyond me.
Hai sir how to identify is a fins or not outside of tubes
Pretty sure the rusty water is coming from these tubes in the Evaporator. Suggestions for cleaning?
In big pipes why can't we use ball valve instead of butterfly or gate valves
Please let me get lost already. Does the device used in water/gas (cooler controller type R32, etc.) or water/water and water devices have water or gas flowing in the evaporator? Greetings from Poland
Would u tell me what deference benefits between one, two and three pass?
More paases means more heat exchange as larger surface area. That also makes it shorter in length although larger in diameter. More chance for the heat to be full utilised.
thanks for the reply
i have seen lot of videos of refrigerant but i have never seen R22 or R410A as refrigerant in HVAC. is there any other reason beyond economically?
These are being phased out now due to their environmental issues. You might like these videos
Refrigerant types and future: ruclips.net/video/J77a0keM2Yk/видео.html
How refrigerants work: ruclips.net/video/lMqoKLli0Y4/видео.html
Refrigerant retrofit guide: ruclips.net/video/1OqgLcU2buQ/видео.html
greT sir
thaks!
I can't imagine the pressure reliefs for the refrigerant would just vent to the atmosphere, that would be completely against the law over here in North America. At the very least, it would have to vent into some sort of a sealed tank/cylinder.
You must mention that it is a "water-cooled" chiller , because i was interested in "air-cooled" chiller too.
Watch this ruclips.net/video/Ic5a9E2ykjo/видео.html
Types of evaporator for one is shell and tube another one was
What about the difference between direct expansion evaporator and flooded evaporator ?
Direct expansion that meaning liquid refrigerant entering to the evaporator tube( fin and tube type) .indirect expansion that is liquid refrigerant entering the heat exchanger (chiller)tube side is refrigerant shell side is water
If water comes in the evaporator at 12°c how can it leave at 12°c?
Good
Wait I thought the refrigerant was in the copper pipes and not the water.
🤝 sir
❤❤❤❤❤❤❤
Great
I need one help from your side I need the sub tittle for chiller because I am not able to catch your slang pls help me
Auto generated subtitles are available on all video, just click the cc button in the video player. Additionally, you can read the article on our website for the topic.
@@EngineeringMindset thanks
Can you explain the viedoe for calorifiers
Evaporator what is work in plant?
you fool still you Don know basics
Bravissimo
👍
Many thanks for this truly *cool* video! I never even knew about these types of chillers before the last video I watched, but this showed me that they are basically the same principle as a domestic refrigerator - Admittedly on a more industrial scale appropriate to the application - But which transfers heat between secondary inert coolants to reduce the amount of refrigerant required, and also allows the latter to be confined to the plant room where it's much easier to manage and any leaks/escapes are less likely to pose risk to the occupants of the building. ❄💯👍
I keep considering ideas for a hand-driven homebrew/domestically built freezer (I can't afford one by retail, or the electricity to drive one. That's life for disabled people here alas. ♿🏚🇬🇧) but coolant has always been a sticking point; I can't even handle my own gas properly, let alone common refrigerants! 🔥😳
One thing this has shown me is that I don't necessarily have to run on the one circuit; I can apply the chiller/evaporator principle on a smaller scale to have separate circuits for interior and exterior (And reverse the heat transfer if ever needed) and that makes management and construction easier. I'm considering trying out a dense brine made of table salt and tap-water which I _think_ might have high thermal transfer whilst being freeze resistant for the outside coil, and if I can ever bring myself to take the dive I might give it a go! 🧪❄😁
I am manufacturing chiller and cooling tower.
Good